Remove URLRequest::Restart() because it is only referenced by unit tests

net/url_request/url_request_job.h

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_JOB_H_
 #define NET_URL_REQUEST_URL_REQUEST_JOB_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 222 matching lines @@
 
   // Some work performed by NotifyDone must be completed on a separate task
   // so as to avoid re-entering the delegate.  This method exists to perform
   // that work.
   void CompleteNotifyDone();
 
   // Used as an asynchronous callback for Kill to notify the URLRequest that
   // we were canceled.
   void NotifyCanceled();
 
-  // Notifies the job the request should be restarted.
-  // Should only be called if the job has not started a resposne.
-  void NotifyRestartRequired();
-
   // Called to get more data from the request response. Returns true if there
   // is data immediately available to read. Return false otherwise.
   // Internally this function may initiate I/O operations to get more data.
   virtual bool GetMoreData() { return false; }
 
   // Called to read raw (pre-filtered) data from this Job.
   // If returning true, data was read from the job.  buf will contain
   // the data, and bytes_read will receive the number of bytes read.
   // If returning true, and bytes_read is returned as 0, there is no
   // additional data to be read.
@@ skipping 135 matching lines @@
   base::Time final_packet_time_;
 
   // The count of the number of packets, some of which may not have been timed.
   // We're ignoring overflow, as 1430 x 2^31 is a LOT of bytes.
   int observed_packet_count_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestJob);
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_JOB_H_